We read 16 results from Mo American Mexico’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 12,000 people · Water system ID MO2010519 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Fluoridehighest measured · range 1.18 to 1.18 · 2025 report, page 2 | 1.18 ppm | 1 ppm | 4 ppm | Above the health goal1.2x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Radium (combined 226 + 228)highest measured · range 1.2 to 1.2 · sampled 2023 · 2025 report, page 2 | 1.2 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 1.2 to 1.2 · sampled 2023 · 2025 report, page 2 | 1.2 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal24x the health goal |
| Aluminumhighest measured · range 0.02 to 0.02 · 2025 report, page 3 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Chloridehighest measured · range 46 to 46 · 2025 report, page 3 | 46 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 5 to 5 · DBPDUAL-01, highest of 2 sources · 2025 report, page 2 | 5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 39.1 to 39.1 · DBPDUAL-01, highest of 2 sources · 2025 report, page 2 | 39 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range 0.07 to 0.07 · 2025 report, page 2 | 0.07 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 65.3 to 65.3 · 2025 report, page 3 | 65.3 ppm | — | 250 ppm guideline | Within the guideline |
| Calciumhighest measured · range 27 to 27 · 2025 report, page 3 | 27 ppm | None set | None | No health limit |
| Lithiumhighest measured · range 135 to 146 · sampled 2024 · highest of 2 sources · 2025 report, page 3 | 146 ppb | None set | None | No health limit |
| Magnesiumhighest measured · range 32 to 32 · 2025 report, page 3 | 32 ppm | None set | None | No health limit |
| Silicahighest measured · range 11 to 11 · 2025 report, page 3 | 11 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 72.8 to 72.8 · 2025 report, page 3 | 72.8 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Mo American Mexico’s water between Feb 2024 and Aug 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium146 ppbFound in 2 of 2 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Radium and uranium
Found: Radium (combined 226 + 228), Radium-226
What removes it: Reverse osmosis.
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